PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

203974-1Switch,thermostatic

Honeywell International Inc. Div Aerospace - Torrance · NSN 5930-00-091-9254 · FSC 5930 · No Item Name Available
Verified by PartsTable
NSN 5930-00-091-9254 — this item is cataloged by the U.S. Government under National Stock Number 5930-00-091-9254. Primary manufacturer part number: 203974-1.
Features
  • Switch,thermostatic — FSC 5930
  • Mounting Method: BRACKET(S)
  • Contact Stimulus Rating: 400.00 ACTUATION POINT NOMINAL DEGREES FAHRENHEIT
  • Contact Action Stimulus: INCREASE
  • Temp Sensing Element Type: CAPILLARY TUBE
  • Contact Adjustability: DEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE
  • Longest Horizontal Distance Between Mounting Centers: 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
  • Contact Voltage Rating in Volts: 28.0 DC AT SEA LEVEL SINGLE VOLTAGE
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Switch,thermostatic, cataloged under National Stock Number 5930-00-091-9254, is classified within Federal Supply Class 5930 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Honeywell International Inc. Div Aerospace - Torrance. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5930-00-091-9254
Primary Part Number203974-1
Item NameSwitch,thermostatic
FSC / FSG5930 / 59 — No Item Name Available
ManufacturerHoneywell International Inc. Div Aerospace - Torrance
StatusACTIVE
Mounting MethodBRACKET(S)
Contact Stimulus Rating400.00 ACTUATION POINT NOMINAL DEGREES FAHRENHEIT
Contact Action StimulusINCREASE
Temp Sensing Element TypeCAPILLARY TUBE
Contact AdjustabilityDEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE
Longest Horizontal Distance Between Mounting Centers0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
Contact Voltage Rating in Volts28.0 DC AT SEA LEVEL SINGLE VOLTAGE
Media for Which DesignedGAS OR LIQUID
Terminal TypeCONNECTOR, RECEPTACLE
Capillary Tube Length2.000 INCHES MINIMUM AND 2.300 INCHES MAXIMUM IN
Features ProvidedHERMETICALLY SEALED CASE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5895-00-051-475821738 INTERCHANGEABLE
Duplexer
L3 Technologies, Inc. Div Communication Systems-East
4320-00-116-3636Y501830208 INTERCHANGEABLE
Governor,pump,pressure Regulatin
Leslie Controls, Inc. Dba Leslie Controls Inc
3040-00-163-108099121738 INTERCHANGEABLE
Lever,manual Control
Alfa Laval Inc
5325-00-174-985510SA0227 INTERCHANGEABLE
Ring,retaining
Volvo Trucks North America, Inc. Dba (foreign Parent Is Volvo Lastvagnar Ab, Goteborg, Sweden.)
4730-00-201-959121738-3 INTERCHANGEABLE
Tee,boss
Rockwell Collins Inc
4330-00-212-722531A8188 INTERCHANGEABLE
Cleaner Element
Magnetic Technologies Corp Div Ogallala Electronics Division
4310-01-073-551221738 INTERCHANGEABLE
Rod and Piston Asse
American Bristol Industries Inc.
5340-01-252-334521738 INTERCHANGEABLE
Plate,mounting
Parker Hannifin Corporation Div Hydraulic Systems Division
Cross-Reference Index
Part NumberManufacturer
21738 Texas Instruments Inc Metallurgical Materials Div (USA)
203974-1 PRIMARY Honeywell International Inc. Div Aerospace - Torrance (USA)
134SCEC125-15 Northrop Grumman Systems Corporation (USA)
Related Parts
5895-00-051-4758INTERCHANGEABLE
DUPLEXER
21738
4320-00-116-3636INTERCHANGEABLE
GOVERNOR,PUMP,PRESSURE REGULATIN
Y501830208
3040-00-163-1080INTERCHANGEABLE
LEVER,MANUAL CONTROL
99121738
5325-00-174-9855INTERCHANGEABLE
RING,RETAINING
10SA0227
4730-00-201-9591INTERCHANGEABLE
TEE,BOSS
21738-3
4330-00-212-7225INTERCHANGEABLE
CLEANER ELEMENT
31A8188
4310-01-073-5512INTERCHANGEABLE
ROD AND PISTON ASSE
21738
5340-01-252-3345INTERCHANGEABLE
PLATE,MOUNTING
21738

Frequently Asked Questions

What is NSN 5930-00-091-9254?

NSN 5930-00-091-9254 is a Switch,thermostatic, manufactured by Honeywell International Inc. Div Aerospace - Torrance, classified under FSC 5930 (No Item Name Available). Status: active.

What are the part numbers for NSN 5930-00-091-9254?

NSN 5930-00-091-9254 has 3 cross-referenced part numbers: 21738 (Texas Instruments Inc Metallurgical Materials Div), 203974-1 (Honeywell International Inc. Div Aerospace - Torrance), 134SCEC125-15 (Northrop Grumman Systems Corporation).

What NSN replaces 5930-00-091-9254?

There are 8 known substitutes for 5930-00-091-9254: 5895-00-051-4758, 4320-00-116-3636, 3040-00-163-1080 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 203974-1?

Key specifications for 203974-1: Mounting Method: BRACKET(S); Contact Stimulus Rating: 400.00 ACTUATION POINT NOMINAL DEGREES FAHRENHEIT; Contact Action Stimulus: INCREASE; Temp Sensing Element Type: CAPILLARY TUBE. 11 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com